Receiver Jig Guide for Accurate 80% Handgun Drilling
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Solution Overview
Problem
The existing methods for finishing an 80% completed handgun receiver are time-consuming and prone to inaccuracies due to the lack of proper tooling and experience, often requiring sophisticated equipment like drill presses and vises, which can lead to errors in drilling and polishing.
Innovation Solution
A specialized tool jig that holds and guides the receiver to ensure precise drilling, tapping, and polishing, eliminating the need for complex equipment by providing pre-drilled holes and a method to form and complete an 80% receiver into a finished product compatible with factory parts, specifically designed for a Sig Sauer P320 receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sophisticated equipment like drill presses and vises is used, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a jig as an intermediary tool that mediates between the simple hand drill and the workpiece. The jig contains pre-drilled guide holes that guide the hand drill bit, ensuring accurate drilling positions without requiring a complex drill press. This intermediary structure transfers the precision function from complex equipment to a simple guiding mechanism.
Solution Approach 2:
The jig is prepared in advance with all necessary guide holes pre-drilled at precise locations. This preliminary action of creating the guide structure beforehand eliminates the need for complex positioning equipment during the actual drilling operation. The pre-established guide holes provide repeatable accuracy for multiple drilling operations.
2Manufacturing precision
If proper tooling is used, then manufacturing precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The jig serves as an intermediary that provides precision guidance while maintaining ease of use. Instead of requiring the user to master complex positioning techniques or operate sophisticated equipment, the jig's pre-drilled holes provide intuitive guidance that any user can follow, combining precision with simplicity.
Solution Approach 2:
The jig replicates the precise hole pattern that would otherwise require complex machining operations. By creating a physical copy of the desired hole locations in the jig itself, the patent transfers the precision requirement from the manufacturing process to the jig design, which can be prepared once and reused multiple times.
3Manufacturing precision
If experienced operators are used, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The jig enables the workpiece to essentially polish itself by providing precise positioning and guidance. The operator simply needs to follow the guide holes and use the polishing tool along the marked paths, rather than requiring expert judgment and manual positioning. This self-guiding mechanism reduces the time skill development would otherwise require.
Solution Approach 2:
All positioning and guidance information is prepared in advance in the jig structure. The guide holes, marked paths, and positioning features are pre-established, so during the actual drilling and polishing operations, no complex decision-making or skill-based adjustments are needed. This preliminary preparation eliminates the time trade-off between skill development and operational speed.
Data Source
AI summary
A custom-made tool used to control the location and/or movement of parts to be worked to complete an unfinished metal structure into a completed firearm receiver. The tool is a two-part jig fashioned especially for building a handgun receiver from a pre-shaped metal works without the need for other industrial tools or apparatus. Using only commonly available tools in most home work shops, the disclosed jig facilitates producing a firearm receiver from an unfinished metal structure. This disclosure also teaches a method for creating a completed pistol receiver from an unfinished metal structure using the invention.